Case-sensitive enum type casts

[niklaskorz]

PR Info

• Closes postgres: CAST($2 AS CaseSensitiveEnumType) enum type must be enquoted #725
• Dependents:
  • Case-sensitive enum type casts sea-orm#2271

Bug Fixes

• Casting to an enum whose type name was declared case-sensitive does not crash anymore

Breaking Changes

• Enum type casts are now case sensitive, so casting to SomeEnum will now cast to "SomeEnum" on PostgreSQL, while it previously casted to someenum.

[niklaskorz]

This still has problems with arrays, as sea-orm constructs array types directly as {enum_name}[], making it hard to only quote the type name but not the array brackets from sea-query.